11.  Another principal reason for discouragement is that the peace process has hardly changed anything in the daily lives of Palestinians, which in some ways has become even harder.

12.  A principal reason rent control does not work, the study said, is because it reduces the supply of apartments available.

13.  Computers are a principal reason.

14.  Crime has been cited as the principal reason for a new wave of emigration.

15.  Earlier disclosures have suggested the principal reason for the injections was to study the effect of such exposure on the human body.

16.  For many Americans, the ability to call for help in an emergency is the principal reason they own a wireless phone.

17.  For two principal reasons, however, neither Ruelas nor De La Hoya were lured into that world.

18.  Furthermore, the Slovenian agreement does not meet the requirements to be a qualified transaction for two principal reasons, the Serbian document states.

19.  Happily, it was restored to the film and was apparently the principal reason that she won the Oscar.